diff --git a/doc/reference/concepts.xml b/doc/reference/concepts.xml
index feb41de..ffe32c1 100644
--- a/doc/reference/concepts.xml
+++ b/doc/reference/concepts.xml
@@ -38,6 +38,12 @@
     </copyright>
 
     <legalnotice>
+      <para>Distributed under the Boost Software License, Version 1.0.
+      (See accompanying file <filename>LICENSE_1_0.txt</filename> or copy at 
+      <ulink
+      url="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</ulink>)
+      </para>
+
       <para>This product includes software developed at the University
       of Notre Dame and the Pervasive Technology Labs at Indiana
       University. For technical information contact Andrew Lumsdaine